On 07/02/2014 12:49 AM, George R Goffe issued this missive:
Hi,
I have a Fedora 19 system with several large 2-4TB drives attached via USB-SATA
docking stations.
I'm seeing a problem whereby a specific filesystem that hasn't been accessed
for some time and is REALLY slow to respond to initial requests. ls -alt for
example takes a substantial bit of time to respond at first but then response
is acceptable after that.
I'm trying to figure out what's happening and why and what I can do about it.
It's like the buffers are empty and they need to be filled. Are there kernel
tunable parameters that can be changed to avoid this problem?
I can think of two things:
1) The drive was spun down because of inactivity. Try looking at the
man page for "hdparm", specifically the "-B" and "-S" options.
2) Caching. If the filesystem hadn't been accessed in a while, its
contents are probably no longer cached. Don't know if you can do
anything about that.
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- Rick Stevens, Systems Engineer, AllDigital ri...@alldigital.com -
- AIM/Skype: therps2 ICQ: 22643734 Yahoo: origrps2 -
- -
- Careful! Ugly strikes 9 out of 10 people! -
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